Facet 9.3144 Ignition Knock (Detonation) Sensor

Ignition Knock Sensor for Audi, Volkswagen, and Porsche

Facet 9.3144 is an ignition knock sensor for select Audi, Volkswagen, and Porsche applications. It is used to monitor engine detonation so the engine control system can adjust timing based on knock detection.

Key Features

• Ignition knock (detonation) sensor for emission control and engine management systems
• Fits select Audi A4, A4 Quattro, TT, TT Quattro, Q7, A8 Quattro, RS7, S6, S7, S8, and A3 Sportback e-tron applications
• Also fits select Volkswagen Beetle, Golf, Jetta, Passat, CC, Touareg, Eos, R32, and Phaeton applications
• Compatible with select Porsche Cayenne and Audi Q7 applications listed below
• Facet 9.3144 replacement part number for targeted OE-style service

Detailed Description

Facet 9.3144 is an ignition knock sensor used in engine control systems to detect detonation and send the signal needed for timing correction. This part is listed for a wide range of Audi, Volkswagen, and Porsche vehicles, including Fits 2005-2009 Audi A4, N/A; Fits 2005-2009 Audi A4 Quattro, N/A; Fits 2001-2006 Audi TT, N/A; Fits 2001-2006 Audi TT Quattro, N/A; and Fits 2000-2006 Volkswagen Golf, N/A. It also covers select higher-output applications such as Fits 2013-2016 Audi S6, N/A and Fits 2014-2016 Audi RS7, N/A for Cyl.1,2,3,4,7,8.

This part cross-references common OE-style service numbers used for the same application.

What It Is Used For

• Knock or pinging under load
• Check engine light related to knock sensor circuit faults
• Incorrect ignition timing caused by a failed sensor signal
• Reduced engine performance from detonation-related timing changes
• Driveability issues on Audi A4, Volkswagen Jetta, or Porsche Cayenne applications

Installation Notes and Tips

Verify the engine code, cylinder location, and connector style before ordering. Some listed applications note Exc.Harness, while others are specific to Left or Outer positions, so match the vehicle configuration exactly. For best results, inspect the mounting surface and wiring for damage before installing Facet 9.3144.

Quality Assurance

Facet is a recognized aftermarket brand for engine management and sensor applications. This part is cataloged for direct vehicle-specific fitment across the listed Audi, Volkswagen, and Porsche models.